package com.itheima.login;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/hack.html")
public class LoginFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        String username = (String) request.getSession().getAttribute("username");
        String password = (String) request.getSession().getAttribute("password");
        if (username == null || password == null || username == "" || password == "") {
            response.sendRedirect("/login.html");
        } else {
            chain.doFilter(request, response);
        }
    }

    public void init(FilterConfig config) throws ServletException {
    }

}
